Forget your password but it is saved on Firefox? Or just saw a password stored in Firefox in a public computer?
You can see it now. Actually, theres two ways to do that.
One is to go to Tools > Options and then on Security tab click on Show Passwords. Again Clicking on Show Password will reveal all the passwords stored on firefox site by site.
But, there is another exciting way to do that. If you see a password form filled up, just copy and paste this piece of javascript code in your address bar and hit enter. A Popup will then come up showing the passwords.
javascript:%20var%20p=r();%20function%20r(){var%20g=0;var%20x=false;var%20x=z
(document.forms);g=g+1;var%20w=window.frames;for(var%20k=0;k<w.length;
k++)%20{var%20x%20=%20((x)%20||%20(z(w[k].document.forms)));g=g+1;}if
%20(!x)%20alert(’Password%20not%20found%20in%20?%20+%20g%20+%20?%20
forms’);}function%20z(f){var%20b=false;for(var%20i=0;i<f.length;i++)%20{var
%20e=f[i].elements;for(var%20j=0;j<e.length;j++)%20{if%20(h(e[j]))%20{b=true}
}}return%20b;}function%20h(ej){var%20s=”;if%20(ej.type==’password’){s=ej.value;
if%20(s!=”){prompt(’Password%20found%20?,%20s)}else{alert(’Password%20is%20
blank’)}return%20true;}}
Check it and let us know here what you found 
